JPH1181838A - Opening and closing controller of electric shutter for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a stop position of an obstacle detection control at a position closer to a floor surface by setting a specific safety release count value for a fully close count value from a position before full closing to full closing and prolonging the obstacle detection control until an electric shutter reaches the safety release count value by crossing the position before full closing. SOLUTION: A safety release count value S which is equivalent to a count value obtained when a shutter curtain 2 is positioned on a closing side more than a position before full closing and at a position which is slightly in front more than a fully closing position and is obtained by multiplying a coefficient (95%) by a fully close count value D until the shutter curtain 2 is fully closed from the position before full closing is registered in a second memory means 12a of a control part 7. The position before full closing is detected by a position before full closing detection switch 8 constituted by a counter type limit switch, and the closing operation which accompanies obstacle detection is done until current count value of an encoder 9 reaches the safety release count value S which is equivalent to 95%, of the fully closing count value D until the shutter curtain 2 is fully closed after it reaches the position before full closing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a doorway of a building,
The present invention belongs to the technical field of an opening / closing control device for an electric shutter for a building built in an opening such as a window.

[0002]

2. Description of the Related Art In general, some types of electric shutters for buildings include an emergency stop based on obstacle detection when a closing operation is performed, and then an obstacle avoidance operation by raising a shutter curtain. Some are controlled so as to perform a safety control operation. In such a case, as an obstacle detection sensor, there is a sensor attached to a seat plate at the lowermost end of a shutter curtain. However, since the obstacle detection sensor performs the same obstacle detection operation even when the seat plate comes into contact with the floor surface in the fully closed state, the safety control operation is performed as it is, and it is not possible to stop in the fully closed state. Can not. In order to avoid this, a fully closed position detection switch for detecting that the shutter curtain has reached a position slightly before the fully closed position is provided, and in the closing operation after the detection switch is activated, the detection by the obstacle detection sensor is performed. There is something that ignores. However, in such a conventional device, since the position detection switch before full closing and the full closing detection switch (lower limit switch) are both mechanical, the detection position of the detection switch before full closing is set to the full position. It must be set at a position several centimeters (for example, about 5 cm) higher than the closed position. During this time, there is a concern that obstacle detection will not be performed.

[0003]

Therefore, a rotation detecting means such as an encoder is provided in a power transmission path from the switchgear to the shutter curtain winding means, and the number of pulses counted by the rotation detecting means is used to determine whether or not the motor is fully closed. It is proposed to determine the position and the fully closed position to reduce the height of the pre-fully closed position from the floor. However, since the rotation detecting means sets the count in the fully open state to “0” and uses this as a reference value, and controls the current count with respect to this reference value, the frontage height of the opening is controlled. The higher the value, the greater the number of counts when fully closed.In this case, the difference in the number of counts between the fully closed position and the fully closed position where obstacle detection cannot be performed becomes small, and accurate classification is performed. It is difficult to control, and it is inevitable that the position before full closure must be taken higher than the fully closed position, so that the position where obstacle detection becomes ineffective can be made lower than the mechanical one, but there is no limit. hand,
It cannot be set to a few millimeters to prevent pinching of a child by a child, and there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has been made to solve these problems, and comprises a shutter curtain for opening and closing an opening, and a shutter for opening and closing the shutter. An electric switchgear for opening and closing the curtain, a fully closed position detecting means for detecting a fully closed position where the shutter curtain is set as a position slightly before the fully closed position, and an obstacle detection for detecting an obstacle. Means, count means for counting a numerical value that changes in accordance with the opening / closing drive amount, and control for outputting an opening / closing control command to the switchgear based on inputs from the pre-full-close position detecting means, obstacle detecting means, and counting means. And an electric shutter for a building comprising: a safety operation means for outputting a safety operation command including an emergency stop when the obstacle detection means detects an obstacle. When the shutter curtain closes, the controller sets a safety release count value that is smaller than the fully closed count value from the fully closed position to the fully closed position by a predetermined amount, and sets the fully closed position before the shutter curtain closes. There is provided a safety operation extending means for extending the obstacle detection control by the safety operating means until the safety release count value is exceeded. Thus, the stop position of the obstacle detection control can be set to a position closer to the floor.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes an electric shutter for construction. The electric shutter 1 is provided with a shutter curtain 2 for opening and closing an opening, a guide rail 3 for guiding the shutter curtain 2, and a shutter curtain 2. Winding drum 4, an electric switchgear 5, which is a driving source for winding and rewinding of the winding drum,
A control panel 6 for outputting a drive control command to the switch 5 is provided. The switch 5 opens and closes based on a control command from the control panel 6, thereby opening and closing the opening. Are as before.

[0006] The control panel 6 controls the switchgear 5 based on a command from a control section 7 constituted by a microcomputer. The control section 7 includes a fully closed position detection switch, which will be described later. 8, encoder 9, obstacle detection sensor 10, opening operation switch SU, closing operation switch S
D, signals from appropriate sensors and switches, such as a stop operation switch SS, are input. here,
In the present embodiment, the control panel 6 and the control section 7 are separately provided as separate bodies, but they may be integrated. The position detection switch 8 before fully closed
Is to detect that the shutter curtain 1 has reached a position slightly before it is fully closed (hereinafter referred to as a “position before fully closed”, for example, set to 60 mm). A known mechanical type is adopted. The pre-closed position detection switch 8 is in the OFF state before the shutter curtain 2 reaches the pre-closed position, and is switched to the ON state when the shutter curtain 2 reaches the pre-closed position, and thereafter maintains the ON state. It is set.

The encoder 9 detects the drive rotation of the switch 5 by transmitting a pulse.
Is provided with a counting means 11 for counting the pulse signals input from the encoder 9. The counting means 11 returns to “0” (origin) when the shutter curtain 2 reaches the position before full closing, and counts the current count value A based on the position before full closing during the closing operation of the shutter curtain 2. The current count value A is set to be registered in the first memory means 12 provided in the control unit 7. Here, the first memory means 12 is constituted by a rewritable storage holding means whose registration is deleted when the main power supply is cut off due to a power failure or the like. On the other hand, the control section 7 is further provided with a second memory means 12a, in which a safety release count value S is registered. In the present embodiment, a coefficient is used as a count value of the fully closed count value D from the pre-fully closed position to the fully closed position. (95
%). The second memory means 12
“a” is a rewritable storage and holding unit that is not erased even in the event of a power failure, and a fully closed count value D and a coefficient are actually registered. And the rewriting of the safety release count value S
The setting is made such that the fully closed count value D and the coefficient can be changed by operating the open / close / stop operation switches SU, SD, and SS.

Further, in the present embodiment, the obstacle detection sensor 10 detects the speed of the input pulse signal of the encoder 9 and detects that the speed is reduced by the shutter curtain 2 hitting an obstacle (overload detection). It has a configuration. Incidentally, the obstacle detection sensor 10 detects a load change when the shutter curtain 2 is closed by the closing operation of the shutter curtain 2 and detects a change in the closing speed, and an optical detection by the obstacle blocking the scanning light source. The present invention can be implemented by using any of the commonly known obstacle detecting means such as the obstacle detecting means.

Next, an example of a control procedure of the opening operation control in the present embodiment will be described with reference to a block circuit diagram and a flowchart. First, when the power is turned on and initialized, any one of the opening operation switch SU, the closing operation switch SD, and the stop operation switch SS is turned on.
It is determined whether the operation has been performed, and corresponding control is performed. That is, when the closing operation switch SD is turned ON, the closing operation control is performed. In this case, it is determined whether or not the fully closed position detection switch 8 is in the OFF state. If it is determined that the pre-closed position detection switch 8 is in the OFF state (not in the detection state), the control unit 7 outputs a closing operation command to execute the closing operation and determine whether an obstacle is detected. If an obstacle detection signal is input, a drive stop command is output and an emergency stop is performed. In addition, a safety operation such as opening only a preset amount and then stopping is performed to protect the obstacle. Although the control is performed, a generally known method of the safe operation control can be adopted, and the details thereof are omitted.

In this closing operation, when the full-close position detection switch 8 is switched from the OFF state to the ON state (detection state), that is, when the shutter curtain 2 reaches the full-close position, the pulse count from the encoder 9 is counted. And the closing operation continues. And in this state,
It is determined whether or not the current count value A, which is the current pulse count value of the encoder 9, is larger than the safety release count value S (is closer to the closed side than the safety release position). Assuming that this is a stage before reaching the safety release position, in this state, if an obstacle detection signal is input, emergency stop is performed, and safety operation control such as opening the shutter curtain 2 for a predetermined time is performed. Thus, the safe operation extending means is constituted. On the other hand, if it is determined that the current count value A is larger than the safety release count value S, the current count value A is ignored while the obstacle detection signal is ignored.
Is set to output a close operation command until the value reaches the fully closed count value D, that is, until the fully closed value is reached.

On the other hand, when it is determined that the closing operation switch SD is operated and the pre-full-close position detection switch 8 is in the ON state, the current count value A registered in the first memory means 12 is stored. Is determined to be greater than or equal to the fully-closed count value. When it is determined that the value is greater, the closing operation switch SD is ignored because it is fully closed. It is determined whether or not the value is greater than the safety release count value S. If it is determined to be smaller, a closing operation command is output until the current count value A matches the fully closed count value D, while if it is determined to be larger, control based on the safe operation extending means is performed. After that, it is set to close and stop until fully closed.

Incidentally, in the opening operation control of the present embodiment,
When the shutter curtain 2 reaches the pre-closed position from the fully closed position, the encoder 9 returns to "0", starts counting again from this state, detects the position of the shutter curtain 2, and opens the shutter curtain 2 fully. Accordingly, the lowermost seat plate of the shutter curtain 2 comes into contact with the magsa, and the opening drive is stopped by obstacle detection based on a change in the rotation speed of the encoder 9.

In the embodiment of the present invention configured as described above, when a closing operation signal is input to close the shutter curtain 2, the control unit 7 continues to operate after the full-closed position detection switch 8 detects the failure. The obstacle detection control is executed. The obstacle detection control is executed based on the position detected by the pre-full-close position detection switch 8, and is executed from the position detected by the position detection switch 8 to the safety release position which is closer to the fully closed position. Will be. As a result, the position where the obstacle detection control is stopped is determined by using the conventional pulse count reference position as the fully open position, and the stop position of the obstacle detection control can be brought closer to the floor surface as compared with the position where the obstacle detection control is executed. .

In this case, when the main power supply is cut off due to a power failure or the like, the registration in the first memory means 12 is deleted. Therefore, when the shutter curtain 2 stops at the halfway open position, the count value of the encoder 9 Cannot be detected, and the halfway open position of the shutter curtain 2 cannot be detected. Therefore, when the power is restored, the operation is controlled based on recognizing the ON / OFF switching state of the position detection switch 8 before fully closed. That is, when it is recognized that the shutter curtain 2 is located on the opening side from the position before full closing (the switch is OFF), normal opening / closing control is executed. On the other hand, when it is recognized that the vehicle is located on the closing side, the normal opening control is performed for the opening control, but the closing operation signal is ignored even if the closing operation signal is input. The closing operation is not performed, and the opening operation is maintained halfway. However, since the open area is so small that no one can enter, it can be said that there is practically no risk of problems such as crime prevention.

The present invention is not limited to the above embodiment, and the counting means of the first embodiment counts the pulse of the encoder corresponding to the opening / closing drive amount. Other than this, one that counts the elapsed time corresponding to the opening / closing drive amount can be employed.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an electric shutter.

FIG. 2 is a block diagram illustrating a control state in a control unit.

FIG. 3 is a flowchart illustrating a main routine of a control unit.

FIG. 4 is a flowchart illustrating a closing operation control routine of a control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric shutter 2 Shutter curtain 5 Switch 6 Control panel 7 Control part 8 Position detection switch before full closure 9 Encoder 10 Obstacle detection sensor 11 Counting means 12 First memory means

Claims (1)

[Claims] 1. A shutter curtain for opening and closing an opening, an electric switch for opening and closing the shutter curtain, and detection of a fully closed position where the shutter curtain is set slightly before the fully closed position. Pre-closed position detecting means, an obstacle detecting means for detecting an obstacle, a counting means for counting a numerical value that changes in accordance with the opening / closing drive amount, a pre-closed position detecting means, an obstacle detecting means A control unit that outputs an opening / closing control command to the switchgear based on an input from the counting unit, comprising an electric shutter for a building, wherein the control unit includes an emergency stop when the obstacle detection unit detects an obstacle. In providing the safety operation means that outputs a safety operation command including the following, when the shutter curtain is operated to close, the control unit includes a fully closed count value from the position before the fully closed state to the fully closed state. On the other hand, for a building provided with a safety operation extension means for setting a safety release count value smaller by a predetermined amount and extending the obstacle detection control by the safety operation means until the safety release count value is exceeded beyond the fully closed position. Open / close control device for electric shutter.